Coaxial light source for laser ranging

Abstract

The utility model discloses a coaxial light source for laser ranging, which comprises a base and a light combining mirror, the surface of the base is provided with a transmitting and receiving plate, the transmitting and receiving plate is provided with a ranging laser, an indicating laser and a receiver which are positioned in the base, and the light combining mirror is mounted in the base. The light combining mirror is used for realizing light coaxiality of the indicating laser and the distance measuring laser, and the indicating laser and the receiver are provided with a distance measuring lens cone and a receiving lens cone; light of the distance measuring laser and light of the indicating laser can be coaxial through the reflecting mirror and the light combining mirror, the distance measuring laser with the high power of 905 nm or other high-power infrared laser is adopted, the distance measuring range is farther, sunlight resistance is better, the light of the distance measuring laser and the light of the indicating laser are coaxial, and a measured point can be directly checked. Ranging and indicating places are ensured to be the same position, and debugging and mounting of the laser ranging equipment are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of laser ranging technology, specifically a coaxial light source for laser ranging. Background Technology

[0002] Laser ranging in industrial applications generally requires visible light wavelengths for easy indication. However, most ranging lasers produced using semiconductor technology are infrared, such as 905nm, 850nm, 940nm, 1064nm, 1550nm, etc. Infrared laser sources can have very high power, and the infrared light component in the environment is small, so they have strong anti-interference capabilities.

[0003] In related technologies, industrial TOF ranging typically uses visible light such as red or green light as ranging lasers. However, current semiconductor technology shows that red light ranging lasers generally have lower power and higher cost. Furthermore, red light has a higher component in ambient light, resulting in poor resistance to strong light. Therefore, a light source that can combine the advantages of both is needed. Utility Model Content

[0004] The purpose of this invention is to provide a coaxial light source for laser ranging to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coaxial light source for laser ranging, comprising a base, a transmitting and receiving plate mounted on the surface of the base, a ranging laser, an indicating laser, and a receiver mounted on the transmitting and receiving plate inside the base, wherein the ranging laser and the indicating laser are placed horizontally or vertically relative to each other, and the light from the ranging laser and the red light from the indicating laser are emitted coaxially, resulting in a longer ranging range;

[0006] A beam combiner is installed inside the base. The beam combiner is used to make the beams of the indicator laser and the range measuring laser coaxial, and the beam of the range measuring laser makes it easier to view the measured point.

[0007] The indicator laser and receiver are equipped with a ranging lens tube and a receiving lens tube, which improves measurement accuracy and stability.

[0008] Furthermore, the light combining mirror is a dichroic mirror, which reflects infrared light and transmits visible light or reflects visible light and transmits infrared light, making it convenient to adjust the shape of the coaxial light source according to requirements and providing greater flexibility in production.

[0009] Furthermore, both the ranging lens tube and the receiving lens tube are equipped with lenses, which can better emit and receive light, thereby improving the stability of the ranging.

[0010] Furthermore, the base is provided with a placement hole, and a filter is provided in the placement hole in front of the receiver to eliminate the interference of stray light and improve the accuracy and reliability of the measurement.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) By using a reflector and a beam combiner, the light from the ranging laser and the indicator laser can be made coaxial. A high-power 905nm ranging laser or other high-power infrared laser can be used to achieve a longer ranging range and better sunlight resistance.

[0013] (2) The coaxial optical axis of the ranging laser and the indicating laser allows direct viewing of the measured point, ensuring that the distance measured and the indicating location are the same, which facilitates the debugging and installation of the laser ranging equipment. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 This is a schematic diagram of the first disassembly of the present utility model;

[0016] Figure 3 This is a schematic diagram of the second disassembly of the present utility model;

[0017] Figure 4 This is a schematic diagram showing the vertical placement of the ranging laser and the indicating laser of this utility model;

[0018] Figure 5 This utility model Figure 4 A schematic diagram showing the interchange of the mid-range laser and the indicator laser;

[0019] Figure 6 This is a schematic diagram showing the horizontal placement of the ranging laser and the indicating laser of this utility model;

[0020] Figure 7 This is a schematic diagram showing the return light of the vertically placed range-measuring laser and indicator laser of this utility model.

[0021] Figure 8 This is a schematic diagram showing the return light of the horizontally placed range-measuring laser and indicator laser of this utility model.

[0022] In the diagram: 1. Transmitter / receiver board; 2. Indicator laser; 3. Base; 4. Reflector; 5. Beam combiner; 6. Light output aperture; 7. Light return aperture; 8. Receiver tube; 9. Rangefinder tube; 10. Lens; 11. Rangefinder laser; 12. Receiver; 13. Filter; 14. Placement hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example:

[0025] Please see Figure 1-8 This utility model provides a technical solution: a coaxial light source for laser ranging, including a base 3, on the surface of the base 3 is a transmitting and receiving plate 1, and a ranging laser 11, an indicating laser 2, and a receiver 12 located inside the base 3 are mounted on the transmitting and receiving plate 1. The ranging laser 11 and the indicating laser 2 can emit 905nm light and 650nm light, and other light can also be used as needed. The ranging laser 11 and the indicating laser 2 are placed horizontally or vertically relative to each other, which makes it convenient to adjust their positions as needed. The horizontal placement results in a smaller volume, while the vertical placement eliminates the need for a reflector 4.

[0026] A beam combiner 5 is installed inside the base 3. The beam combiner 5 is used to realize the coaxiality of the beams of the indicator laser 2 and the range measuring laser 11.

[0027] The indicator laser 2 and receiver 12 are equipped with a ranging lens 9 and a receiving lens 8. The ranging lens 9 can ensure that the collimation of the emission is adjustable and convenient for debugging; the receiving lens 8 can prevent ambient light from directly shining on the receiver 12, thus avoiding interference with the accuracy of the received signal.

[0028] In this embodiment, the light combining mirror 5 is a dichroic mirror, which reflects infrared light and transmits visible light or reflects visible light and transmits infrared light, depending on the installation position of the ranging laser 11 and the indicating laser 2.

[0029] In this embodiment, as Figure 2 As shown, both the ranging lens tube 9 and the receiving lens tube 8 are equipped with lenses 10. The lenses 10 focus the light, which helps to increase the distance between the ranging laser 11 and the indicating laser 2, and also makes the receiver 12 more sensitive to receive the light.

[0030] In this embodiment, as Figure 2 As shown, a reflector 4 is installed inside the base 3. The reflector 4 reflects the light from the ranging laser 11 to the beam combiner 5. When the indicator laser 2 and the ranging laser 11 are placed horizontally, the direction of the light from the ranging laser 11 needs to be changed with the help of the reflector 4.

[0031] In this embodiment, as Figure 3As shown, the base 3 is provided with a placement hole 14, and a filter 13 located in front of the receiver 12 is provided in the placement hole 14 to eliminate the interference of stray light and ensure that the receiver 12 can accurately and stably receive light.

[0032] In this embodiment, as Figure 2 As shown, the base 3 has a light-emitting hole 6 and a light-returning hole 7 on its side to ensure that light is emitted and returned smoothly.

[0033] Specifically, when using it, such as Figure 2 and Figure 8 As shown, the ranging laser 11 and the indicating laser 2 are placed in parallel. Taking the ranging laser 11 emitting 905nm infrared light and the indicating laser 2 emitting 650nm visible light as an example;

[0034] Reflector 4 is required. At this time, beam combiner 5 transmits infrared light and reflects visible light. The ranging laser 11 emits high-power 905nm infrared light that passes through beam combiner 5. The 650nm visible light emitted by the indicator laser 2 shines through reflector 4 and then shines on beam combiner 5. Beam combiner 5 then reflects the visible light, achieving coaxiality of visible light and infrared laser. Receiver 12 receives the infrared light and calculates the distance.

[0035] No need to use mirror 4, such as Figure 4 As shown, the ranging laser 11 and the indicating laser 2 are placed vertically. When the ranging laser 11 is on the left and the indicating laser 2 is on the top, the beam combiner 5 reflects infrared light and transmits visible light, achieving coaxiality of visible light and infrared laser. The return path of the infrared light from the receiver 12 is as follows... Figure 7 As shown;

[0036] No need to use mirror 4, such as Figure 5 As shown, the ranging laser 11 and the indicating laser 2 are placed vertically. When the ranging laser 11 is on the upper side and the indicating laser 2 is on the lower side, the beam combiner 5 reflects visible light and transmits infrared light, achieving coaxiality of visible light and infrared laser. When the receiver 12 receives infrared light, it is as follows: Figure 7 As shown.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coaxial light source for laser ranging, characterized in that, It includes: The base (3) is surface-mounted with a transmitting and receiving board (1), and the ranging laser (11), indicating laser (2) and receiver (12) are installed inside the base (3). The ranging laser (11) and indicating laser (2) are placed horizontally or vertically with each other. The light combiner (5) is installed inside the base (3) to realize the light coaxiality of the indicating laser (2) and ranging laser (11). The ranging mirror barrel (9) and receiving mirror barrel (8) are arranged on the ranging laser (11) and receiver (12).

2. A coaxial light source for laser ranging according to claim 1, characterized in that: The light combiner (5) is a dichroic mirror which reflects infrared light and transmits visible light or reflects visible light and transmits infrared light.

3. A coaxial light source for laser ranging according to claim 1, characterized in that: The lens (10) is installed inside the ranging mirror barrel (9) and receiving mirror barrel (8).

4. A coaxial light source for laser ranging according to claim 1, characterized in that: The reflecting mirror (4) is selectively installed inside the base (3) to reflect the visible light of the indicating laser (2) and the infrared light of the ranging laser (11) to the light combiner (5).

5. A coaxial light source for laser ranging according to claim 1, wherein: The placing hole (14) is arranged on the base (3), and the filter (13) is arranged in front of the receiver (12) in the placing hole (14).

6. A coaxial light source for laser ranging according to claim 1, wherein: The light emitting hole (6) and light returning hole (7) are arranged on the side of the base (3).

7. A coaxial light source for laser ranging according to claim 1, characterized in that: The ranging laser (11) and indicating laser (2) emit infrared laser and visible laser.

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